lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 27 Feb 2019 09:53:10 +0800
From:   Joseph Qi <joseph.qi@...ux.alibaba.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        luto@...nel.org, Jiufei Xue <jiufei.xue@...ux.alibaba.com>,
        Xu Yu <xuyu@...ux.alibaba.com>, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org
Subject: Re: [bug report][stable] perf probe: failed to add events



On 19/2/26 21:08, Greg KH wrote:
> On Tue, Feb 26, 2019 at 08:32:34PM +0800, Joseph Qi wrote:
>>
>>
>> On 19/2/26 17:05, Greg KH wrote:
>>> On Tue, Feb 26, 2019 at 03:31:14PM +0800, Joseph Qi wrote:
>>>> Hi,
>>>>
>>>> I'm using kernel v4.19.24 and have found that there is an issue when
>>>> using perf probe to define a new dynamic tracepoint.
>>>>
>>>> $ perf probe -a handle_mm_fault
>>>> Failed to write event: Numerical result out of range
>>>>   Error: Failed to add events.
>>>>
>>>> I've also tried kernel v4.20, and it can pass.
>>>
>>> Ick, has this ever worked on the 4.19 stable tree?  If so, any chance
>>> you can run 'git bisect' to find the offending commit?
>>>
>> >From my test, v4.19.0 also has this issue.
>> Bisect locates that it is introduced by commit bf904d2762ee
>> "x86/pti/64: Remove the SYSCALL64 entry trampoline".
> 
> But that commit was in 4.20, not 4.19.  So if this never worked, it's
> not a regression?
> 
> confused,
Oops, my fault.
The first bad commit is:
d83212d5dd67 kallsyms, x86: Export addresses of PTI entry trampolines

It is between v4.18 and v4.19.

> 
> greg k-h
> 

Powered by blists - more mailing lists